National Instruments NI 6509 - Manual (Page 18)

NI 6509 User Guide and Specifications 18 ni.com
Driving a Relay >24 mA
Figures 9 and 10 are examples of connecting the NI 6509 to a relay that
requires more than 24 mA of current. These examples use an additional
transistor circuit.
Figure 9. NI 6509 Sinking Connection Example, >24 mA
Figure 10. NI 6509 Sourcing Connection Example, >24 mA
Driving SSRs
Figure 11 shows an example of connecting the NI 6509 to a solid-state
relay (SSR).
Figure 11. NI 6509 SSR Connection Example
P X.Y
GND
NI 6509
Vcc
P X.Y
GND
NI 6509
Vcc
+
–
V
AC SSR
P X.Y
GND Load
Load
NI 6509